I had rather seen that money going elsewhere (other free project).
I mean, yes, money for a free software project is fine.
Making interoperability is also fine.
It's just... I am very afraid of Microsoft's U-Boot (submarine) patents that will suddenly emerge once Mono is widespread in use. I'll better keep my hands off Mono and products that require it. (Horrible enough that some progs in Windows want you to have .net 1, 2, 3, 4 or whatever and all at the same time installed. Sucks.
The licensing situation isn't clear to me though - Apple don't allow (L)GPL software in the iOS app store, and Mediator Software don't own the Qt copyright so can't issue commercial licenses. And Nokia aren't selling commercial licenses for iOS use